Bobby Womack earned a reputation as “The Poet” for disco and funk-tinged soul stories like “I Can Understand It” and “How Could You Break My Heart?” But he could also belt a rousing shouter like “I'm a Midnight Mover.” His unique voice draped James Taylor's “Fire and Rain” in a thick layer of bluesy sorrow and brought a world-weary grit to his mentor Sam Cooke's “A Change Is Gonna Come.”